Rear sight for guns.



No. 785,893. PATBNTED MAR. z8, 1905.- H. A. VON KRETSGHMAR @L J. KURIG.

REAR SIGHT FOR GUNS.

APPLIOATION FILED ooT.17,19o4.

3 SHEETS-SHEET 1.

69,7% Ow/ am.

No. 785,893. APiAlBN'lVED MAR. 28, 1905. H. A. VON KRE'I'SCHMAR ;V J. KURIG.

REAR SIGHT FOR- GUNS.

APPLICATION FILED ooT.17,19o4.

@faQ/ 142g: la

No. 785,893. L PATENTD MAR. 28, 1905. H. A. VON KRBTSGHMAR & J. KURIG.

REAR SIGHT FOR GUNS.

APPLICATION FILED 0OT.17, 1904.

3 SHEETS-"SHEET 3.

UNTTED STATES Patented March 28, 1905.

PATENT OEEICE.

HANS ALFRED VON KRETSCHMAR AND JOSEF KURIG, OF ESSEN-ON-THE- RUHR, GERMANY, ASSIGNORS TO FRIED. KRUPP AKTIENGESELLSCHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.

REAR SIGHT FOR GUNS.

SPECIFICATION forming part of Letters Patent N0."785,893, dated March 28, 1905.

Application filed October 17, 1904. Serial No. 228,821.

To rt/Z whom, t may concern:

Be it known that We, HANS ALFRED VON KEETscHMAR, residing at Essener Hof, and Josm KURIG. residing' at 16 Holzstrasse, Essenon-the-Ruhr, Germany, subjects of the Emperor of Germany, have invented acertain new and useful Improvement in Rear Sights for Guns, of which the following is a specification.

IO The present invention relates to rear sights for guns with detachable sight device. When the sightdevice in such guns is detached, great care must be taken that the interlocking faces of the rear-sight head and the sight devices do not become dirty or damaged, as it is absolutely necessary that the two interlocking parts closely fit one another', and damage or collection of dirt will render this diflicult.

'I he object of the present invention is to prevent such damage or dirt-collection on the interlocking faces by means of a special protecting-piece.

According to the present invention the protecting-picce comprises two parts closely f1t- 2 5 ting one another and havinginterlocking faces that are true facsimiles of the interlocking faces of the sight device and the rear-sight head, so that when the sight device is detached one of the protecting parts may be secured on the rear-sight head, While the other partis secured to the sight device.

The invention is illustrated in the accompanying drawings, in which- Figure 1 isa View, partly in section, of the 3 5 upper part of a gun rear sight to which the invention may be applied. Fig. 2 is a side view of parts shown in Fig. 1. Fig. 3 is a top view of the same, the sight device being detached. Fig. A is a sectional View of the line 4 4 of Fig. 1 and looking from the left. Fig'. 5 is a view of the sight device detached from the rear sight. Fig. 6 is a perspective View of one embodiment of the protectingpiece. Figs. 7 to l() show a longitudinal section, a side view, a top view, and a front View,

respectively, of the part of the protectingpece adapted to be secured to the rear-sight head. Figs. 11 to 13 show a longitudinal section, a top view, and a front view,respectively,

of the part of the protecting-piece adapted to be secured to the sightdevice, the catch-spring belonging to this part being omitted. Fig.

14: is a view of the rear-sight head with one part of the protecting-piece secured thereto, the protecting-piece being provided with a supplemental sight. Fig. 15 is a side View, partly in section, of Fig. 14:. Fig. 16 is a View, partly in section, of the sight device With the other part of the protecting-piece secured thereto. Fig. 17 is a longitudinal-sec- 60 tion of another embodiment of the protectingpiece especially applicable to gun rear sights with detachable telescope-sights. The telescopes connected with the protecting-piece are shown partly in section. Fig. 18 is a View, 65 partly in section, of the protecting-piece shown in Fig. 17, the telescopes being detached. Fig.

19 is a section on the line 19 19, Fig. 18, looking from the right. Fig. 20 is a section on the line 2O 20, Fig. 18, looking from above. 70 Figs. 21 to 23 are a longitudinal section, a top View, and a front View, respectively, of a detail of the protecting-piece illustrated in Figs.

Referring to Figs. 2 to 5, a short descrip- 75 tion will be given of a rear sight to which the present invention may be applied.

The sight device A, which may be a telescope-sight, is provided with dovetailed rails c', inserted in undercut grooves t', Figs. 2 and 80 4, in the rear-sight head B, and the sight device is held in interlocking engagement with the rear-sight head through the medium of a catch-spring C, provided with a cam c2, that engages the rear side of the bridge a2, Fig. 1, of the sight device. By operating the fingerpiece c3 of the catch-spring C the cam is released from engagement with the bridge a2 of the sight device, and the sight device may be slid out of engagement with the rear-sight head B.

Referring to 'the embodiment of the protecting-piece shown in Figs. 6 to 16, D indicates the part for protecting the rear-sight head B.

(See especially Figs. 6 to 10.) The part Dis provided with dovetailed rails d', that are arranged and shaped to exactly correspond to the rails a of the sight device A. On one end of the protecting part D is a bridge cl2, Fig. 7, arranged and shaped to exactly correspond to the bridge a2 of the sight device A. The part D is further provided with a handle d3 and with a perforated boss (Z4, having a rib On the boss d* a supplemental sight E may be secured, Figs. 14 and 15. F, Figs. 6, 11 to 13, and 16, indicates the part of the protecting-piece that is designed to protect the base of the sight device A when the said device is detached from the rear sight. The structure of the part F corresponds exactly to that of the upper part of the rear-sight head that is to say, it is provided Witha dovetailed groove f', in the bottom of which a catchspring Gr, with a cam g2 and a handle g2, is arranged. (See Figs. 6 and 16. In Figs. 11 to 13 the catch-spring is not shown.) When the sight device A is secured on the rear-sight head B, the parts D and F of the protectingpiece are connected by sliding them into one another (see Fig. 6) until the cam g2 of the catch-spring G engages the rear face of the bridge Z2 of the part D. A closed box is thus obtained. When the sight device is detached from the rear-sight head, the part D of the protecting-piece is inserted on the rear-sight head B (see Figs. 14 and 15) and the part F is inserted on the base of the sight device. (See Fig. 16.) The interlocking faces, the faultless nature of which is of great importance for the correct sighting, are thereby entirely covered and protected against damage and dirt.

The embodiment shown in Figs. 17 to 23 is especially applicable to gun rear sights in which telescopes are used as sight devices. Thus if two of the above-described protecting-pieces are connected by a cross-piece to form an angular-shaped bar the said bar can simultaneously serve as a cover for the telescopes of the two rear sights that are ordinarily used in one gun, and a handy binocular is thus obtained. The shank F2 of the angular bar F2 H K corresponds exactly to the part F of the protecting-piece. In the other shank, K, that is parallel to the shank F2 and is provided with undercut grooves 7c", a slide F:j is inserted, having side walls f4 fitting the grooves c. The interior of the slide F3, that is illustrated in Figs. 21 to 23, corresponds exactly to the part F of the first-described embodiment; but the linger-piece Z3 of the catch-spring L is bent at right angles. Near the iinger-piece Z3 the slide carries a projection f5, that terminates in a screw f, which is parallel to the longitudinal axis of the slide. The screw fe ngages a nut M, that is rotatably but non-slidably journaled in the shank K. A wheel N is rigidly connected to the nut M, and by turning the wheel N the slide F3 may be adjusted in the shank K in the longitudinal direction thereof. By means of the slide F3 the shank K may receive the telescope R' of the supplemental rear sight, While the protecting part of the slide that is designed to cover the rear-sight head is secured on the rear-sight head of the supplemental rear sight. When the protecting part of the shank F2 is detached, the shank may receive the other sight-telescope R. The protecting parts of the shank F2 and the slide F3 exactly correspond to the part D of the iirst-described embodiment, and therefore are not illustrated. When the two telescopes of the gun are arranged on the bar F2 H K, a binocular is obtained, in which by turning the Wheel N the distance between the optic axes of the telescopes lnay be adjusted to correspond to the distance between the eyes of the person who desires to use the binocular. If it be not desired to provide for the adjustment of the distance between the optic axes of the telescopes, the slide F3, with its adjustment device, may be done away with, and in such a case the shank K is shaped so as to exactly correspond to the shank F2.

Having thus described the invention, what is claimed as new therein is 1. A protecting-piece for gun rear sights with detachable sight device, said piece having a face corresponding to the interlocking face of one of the separable parts.

2. A protecting-piece for gun rear sights with detachable sight device, said piece comprising two parts adapted to be interlocked, and having interlocking faces corresponding to the interlocking faces of the gun rear sight and the sight device.

3. A protecting-piece for gun rear sights with detachable sight device, said piece comprising two parts adapted to be interlocked and having interlocking faces corresponding to the interlocking faces of the gun rear sight and the sight device, one of said parts being provided with a supplemental sight device.

4. A pair of protecting-pieces for gun rear sights with detachable sight device, said pieces being connected with each other and each of said pieces comprising two parts adapted to be interlocked and having interlocking faces corresponding to the interlocking faces of the gun rear sight'and the sight device.

5. A pair of protecting-pieces for gun rear sights with detachable sight device, said pieces being connected with each other and each of said pieces comprising a fixed part having interlocking faces corresponding to the interlocking faces of the rear sights so as to re- IOO lIO

ceive the sight devices in interlocking enadjustment toward each other and each of said pieces comprising a fixed part and a detachable part having interlocking engagement, said fixed parts having interlocking faces corresponding to the interlocking faces of the rear sights so as to receive the sight devices in interlocking engagement.

The foregoing speciiieation signed at Essenon-the-Ruhr.

HANS ALFRED VON KRETSCHMAR. JOSEF KURIG. In presence of* HARRY F. MEFFORD, JOHANNES KRONE. 

